VC++笔记

CDC memdc; //临时DC
memdc.CreateCompatibleDC(&dc);//创建临时DC
memdc.SelectObject(&m_bitmap);//选中位图对象
int width,height;//定义位图宽度和高度
BITMAP bmp;
m_bitmap.GetBitmap(&bmp);//获取位图信息
width = bmp.bmWidth;//位图宽度
height = bmp.bmHeight;//位图高度
CRect rect;
this->GetClientRect(&rect);//获取窗体大小
//将位图绘制在窗体上作为背景
dc.StretchBlt(rect.left,rect.top,rect.Width(),rect.Height(),&memdc,0,0,width,height,SRCCOPY);
g_hInstance = hInstance;
if( !Register( "Main", WndProc ) )
{
MessageBox( NULL, "注册失败", "Infor", MB_OK );
return 0;
}
HWND hWnd = CreateMain( "Main", "window" );
//绘图
int g_kind = 0;//标志量（绘制哪种图形）
void OnCommand( HWND hWnd, WPARAM wParam )
{
g_kind = LOWORD(wParam);
switch( g_kind )
{
case ID_PIT:
case ID_LINE:
#include "stdafx.h"
#include "stdio.h"
HINSTANCE g_hInstance = 0;
//HANDLE g_hOutput = 0;
//窗口处理函数
LRESULT CALLBACK WndProc( HWND hWnd, UINT nMsg,
CREATEINSTANCE CreateInstance =(CREATEINSTANCE)GetProcAddress(hDll,"CreateInstance");
//创建接口
IMath * piMath = CreateInstance();
//返回接口
return piMath;
}
void OnPaint( HWND hWnd )
{
PAINTSTRUCT ps = { 0 };
HDC hdc = BeginPaint( hWnd, &ps );
switch( g_kind )
{
case ID_ARC:
DrawArc( hdc );//绘制弧线
}
//显示窗口
void Display( HWND hWnd )
{
ShowWindow( hWnd, SW_SHOW );
UpdateWindow( hWnd );
}
//消息循环
void Message( )
{
MSG nMsg = { 0 };
while( GetMessage( &nMsg, NULL, 0, 0 ) )
LPSTR lpCmdLine,
int nCmdShow)
{
//AllocConsole();
//g_hOutput = GetStdHandle(STD_OUTPUT_HANDLE);
}
int main(int argc, char* argv[])
{
// printf("Hello World!\n");
IMath * pimath = CreateInstance();
int nAdd = pimath->Add(100,50);
printf("%d\n",nAdd);
case ID_PIT:
DrawPit( hdc );//绘制点
break;
}
EndPaint( hWnd, &ps );
}
//窗口处理函数
LRESULT CALLBACK WndProc( HWND hWnd, UINT nMsg,
WPARAM wParam, LPARAM lParam )
case ID_REC:
case ID_ELL:
case ID_ARC:
InvalidateRect( hWnd, NULL, FALSE );
break;
}
}
void DrawPit( HDC hdc )
{
// SetPixel( hdc, 100, 100, RGB(255,0,0) );
lpWndName, WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, CW_USEDEFAULT,
CW_USEDEFAULT, CW_USEDEFAULT, NULL, NULL,
g_hInstance, NULL );
return hWnd;
virtual int Sub(int nSub1,int nSub2);
};
int CMath ::Add(int nAdd1,int nAdd2)
{
return (nAdd1+nAdd2);
}
int CMath::Sub(int nSub1,int nSub2)
{
return (nSub1-nSub2);
}
void DrawEll( HDC hdc )
{
Ellipse( hdc, 100, 100, 300, 300 );
Ellipse( hdc, 300, 100, 600, 300 );
}
void DrawArc( HDC hdc )
{
Arc( hdc, 100, 100, 300, 300, 100, 100, 300, 300 );
LPVOID lpReserved
)
{
return TRUE;
}
//CMath1 接口1
class CMath : public IMath
{
public:
virtual int Add(int nAdd1,int nAdd2);
Display( hWnd );
Message( );
return 0;
}
加载菜单函数MAKEINTRESOURCE
//加载图片背景
CPaintDC dc(this); //窗体DC
CBitmap m_bitmap; //位图变量
m_bitmap.LoadBitmap(IDB_BITMAP1);//载入位图资源
LineTo( hdc, 300, 300 );
LineTo( hdc, 0, 300 );
}
void DrawRec( HDC hdc )
{
Rectangle( hdc, 100, 100, 300, 300 );
RoundRect( hdc, 300, 100, 500, 300, 200, 200 );
{
return (nAdd1+nAdd2);
}
int CMath2::Sub(int nSub1,int nSub2)
{
return (nSub1-nSub2);
}
//接口的实现
IMath * CreateInstance()
{
return new CMath2;
}
//
wce.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
wce.hCursor = NULL;
wce.hIcon = NULL;
wce.hIconSm = NULL;
wce.hInstance = g_hInstance;////////////
for( int i=0; i<256; i++ )
{
for( int j=0; j<256; j++ )
{
SetPixel( hdc, i, j, RGB(i,j,0) );
}
}
பைடு நூலகம்}
void DrawLine( HDC hdc )
{
MoveToEx( hdc, 100, 100, NULL );
return 0;
}
//底层动态库的封装
以实现加法和减法为例：来封装动态库
#include "stdafx.h"
#include "math.h"
BOOL APIENTRY DllMain( HANDLE hModule,
DWORD ul_reason_for_call,
{
TranslateMessage( &nMsg );
DispatchMessage( &nMsg );
}